if (navigator.appName == 'Opera')
    document.write("<tr><td colspan=\"7\" height=\"30\">&nbsp;</td></tr>");
    else {  
    if (navigator.appName == 'Microsoft Internet Explorer')
        document.write("");
    else if (navigator.appName == 'Netscape')
    document.write("<tr><td colspan=\"7\" height=\"30\">&nbsp;</td></tr>");
else 
{
    document.write("<tr><td colspan=\"7\" height=\"30\">&nbsp;</td></tr>");
}	
}